I believe you will need 1 "active" DP to DVI (or HDMI) adapter hooked up to the primary card ( all three outputs should be on the primary card ).
In crossfire you are only using the second GPU to augment the first, the outputs on the second card are effectively disabled. When you use both cards independently (non-crossfire) you could run four monitors, two from each card. I run four monitors off a single 6950, but need 2 active DP to DVI adapters. I use Accell adapters which were about $30 each from Amazon. AMD's Catalyst Control Center video driver will allow you to configure your monitors and TV in any way you like just by dragging the monitors around to the positions that match your setup!